package com.config.interceptor;


import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor implements HandlerInterceptor{

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (request.getSession().getAttribute("username")==null){
            request.setAttribute("msg","你还没有登录");
            request.getRequestDispatcher("/index.html").forward(request,response);
            return false;
        }
        else
        return true;
    }
}
